Wandering Gods of Day and Night

The ancient Buddha's head was stolen by a monster with a human body and a sheep's head.
The Ghost buried an eye in the Buddha's temple, and from then on, the world's fire was extinguished, and darkness engulfed the continent.
To combat the Ghost' invasion, the gods of day and night were born between heaven and earth.
This is a narrative passed down for generations by storytellers.
What was the true nature of the ancient Buddha, the Ghost, and the wandering gods of day and night on the once great continent?
Perhaps, traces can be found in a troupe named 'Zhou Family Troupe.'
The Zhou Family Troupe,
is a troupe that performs operas specifically for the dead...